I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
sacred scored screed scried scared secured sugared scoured scarred squared scrod saggered scurried suckered saggared secret secrete saggard squired skirred scart scrota cigaret skirret security skywrite skywrote
cred nacred sacred acred curried cared squired decreed secret sugared screed skirred daggered tuckered knackered scored beggared saggared recarried gored required shickered credo degreed buggered cored cord carried caried checkered scrod agreed keycard leaguered nickered puckered record scared cried jiggered quarried card curred saggered recurred scoured bickered whickered squared curd scarred dackered scried decried secured daikered garred cured figured scurried acrid creed queried liquored lackered cockered pickeered chequered crud quired queered greed augured suckered dickered shikarred
sacra scoriae sucre scurry scry screwy screw scree scoria sacker score scary scarry scarey scare scar escrow